PrefectHQ prefect Webhook/Notification validate_restricted_url toctou

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-7724
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-04 03:16:13 UTC
Updated2026-05-04 03:16:13 UTC
DescriptionA vulnerability has been found in PrefectHQ prefect up to 3.6.28.dev1. Affected by this vulnerability is the function validate_restricted_url of the component Webhook/Notification. The manipulation leads to time-of-check time-of-use. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used. Upgrading to version 3.6.28.dev2 addresses this issue. The identifier of the patch is 7c70ac54a5e101431d83b9f2681ec88d5e0021ed. Upgrading the affected component is advised.

Risk And Classification

Primary CVSS: v4.0 1.3 LOW from [email protected]

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-362 | CWE-367 | CWE-367 Time-of-check Time-of-use | CWE-362 Race Condition

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary1.3LOWCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/C...
4.0CNADECLARED2.3LOWCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
3.1[email protected]Primary5MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
3.1CNADECLARED5MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
3.0CNADECLARED5MEDIUMCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
2.0[email protected]Secondary4.6AV:N/AC:H/Au:S/C:P/I:P/A:P
2.0CNADECLARED4.6AV:N/AC:H/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
High
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA PrefectHQ Prefect affected 3.6.28.dev1 Not specified
CNA PrefectHQ Prefect unaffected 3.6.28.dev2 Not specified

References

ReferenceSourceLinkTags
github.com/PrefectHQ/prefect/pull/21591 [email protected] github.com
github.com/PrefectHQ/prefect/releases/tag/3.6.28.dev2 [email protected] github.com
vuldb.com/submit/807303 [email protected] vuldb.com
github.com/PrefectHQ/prefect [email protected] github.com
linear.app/prefect/issue/OSS-7874/fix-dns-rebinding-toctou-bypass-in-val... [email protected] linear.app
vuldb.com/vuln/360900/cti [email protected] vuldb.com
gist.github.com/nedlir/fa99777e8989414585d08c3625bf044a [email protected] gist.github.com
vuldb.com/vuln/360900 [email protected] vuldb.com
github.com/PrefectHQ/prefect/commit/7c70ac54a5e101431d83b9f2681ec88d5e00... [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: nedlir (VulDB User) (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-03T00:00:00.000ZAdvisory disclosed
CNA2026-05-03T02:00:00.000ZVulDB entry created
CNA2026-05-03T11:23:35.000ZVulDB entry last update
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report